KVM: emulator: remove duplicated limit check

The check on the higher limit of the segment, and the check on the
maximum accessible size, is the same for both expand-up and
expand-down segments.  Only the computation of "lim" varies.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 43a5b43..f62209e 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -654,20 +654,15 @@ static __always_inline int __linearize(struct x86_emulate_ctxt *ctxt,
                if (!fetch && (desc.type & 8) && !(desc.type & 2))
                        goto bad;
                lim = desc_limit_scaled(&desc);
-               if ((desc.type & 8) || !(desc.type & 4)) {
-                       /* expand-up segment */
-                       if (addr.ea > lim)
-                               goto bad;
-                       *max_size = min_t(u64, ~0u, (u64)lim + 1 - addr.ea);
-               } else {
+               if (!(desc.type & 8) && (desc.type & 4)) {
                        /* expand-down segment */
                        if (addr.ea <= lim)
                                goto bad;
                        lim = desc.d ? 0xffffffff : 0xffff;
-                       if (addr.ea > lim)
-                               goto bad;
-                       *max_size = min_t(u64, ~0u, (u64)lim + 1 - addr.ea);
                }
+               if (addr.ea > lim)
+                       goto bad;
+               *max_size = min_t(u64, ~0u, (u64)lim + 1 - addr.ea);
                if (size > *max_size)
                        goto bad;
                la &= (u32)-1;